You're probably not going to like my response. I live in the Foothills, against a hillside, and we have had scorpions since the day we moved in our new home 13 years ago. I was terrified and ready to sell our new, beautiful home the first night when I saw one...WALKING AWAY FROM THE "BED" WE'D MADE ON OUR FLOOR! To me, it was 6 inches long....we now know better. We got a spray service out right away, who polluted our new carpet and home with toxic spray.
Well, guess what? Do some research on the web. Scorpions are not insects. They are arachnids, with an exoskeleton. Sprays don't work on them AT ALL. Sprays, however, do work on the bugs that are their food. Theoretically, if you get rid of the bugs, you get rid of the scorpions. Didn't work for us. They also say if you have crickets, you don't have scorpions because scorpions eat crickets. Doesn't make sense, does it? Welllll..no. The scorpions love to come out and eat the crickets. When I had my persian cats, I'd come out in the morning occasionally to find a dead scorpion by the fireplace. They were great at tracking them and letting me know about them. To make matters worse, the color of the scorps blend in perfectly with my carpet! Yes, I was petrified with crawling babies. But scorps prefer to come out at night, when it's quiet. They are very sensitive to vibrations. Thank God they don't jump. By the way, they don't affect cats really, but are just as toxic to dogs as they are to us. And how toxic to us? Babies and elderly, along w/those w/a compromised immune system are at risk, but for most, unless there's an allergy, it's like a bad bee sting. Not fun, but not fatal.
After all this time in our home, where we'd either smush them (after learning to be brave - don't smush if you don't have to. They have lots of liquid and leave a stain. We get a lot in our garage!), or, if on the wall, the typical place we see them, we use a clear glass or jar, cover them up, then slide a postcard (like the kind in magazines) underneath the glass to seal him in. They can't climb glass. Then we drown them. But after all this time, we never have been stung, until about 3 weeks ago. DH opened the dishwasher, putting his hand on the top, rather than the handle. I think the scorp felt us coming and climbed off the counter to the safety of the dishwasher. It was right there and got him. He said it hurt like crazy. It swelled a little, then got numb up his arm. It was numb for a few days. I called Poison Control right away, and they walked us through it. The web had said to use ice - Poison Control said that makes it worse, so don't trust the internet. But do keep Poison Control's number by your phone anyway. He took ibuprofen for the pain, but outside of the numbness, that went all the way up his arm, he was OK, pretty much. Heart palpitations, etc. are the things to look for in case there's a rare allergy. They are not fun, but the black widows we have are more dangerous. Also, the rattlers. Just don't reach your hand into something you can't see into, and don't step over a log or rock where you can't see the other side. Oh, and if a scorp climbs on you...don't swat it! I had a baby one on my foot once - heebie jeebies! I brushed it off and then killed it w/a wadded up tissue.
So, yes, empty your shoes, pull back your covers, and don't let them hang to the floor. We taught both kids what they are with the warning to never, ever touch. My two year old has found two of them on the wall in my bedroom and told us right away. I did have a friend who got stung in bed, so it can happen. But for the most part, they are out hunting for food. I found some heading toward my cat's food in the past, too, which surprised me. And wear shoes on your patio and in the yard at night, including around your pool.
There is one more thing you can do. Some companies "seal" your house - like put caulk around the crevices. It's bad in a way because we need fresh air in our polluted homes, but I've talked to those who live near me who swear by it. I know for a fact some have crawled through the area around my front door. I think others have come in through the chimney - just a theory. I think Arizona Exterminating does the sealing, and they've been around for awhile. Your bug guy is a quack - I'd drop that company. I've actually had an entomologist out to my house when I had a termite problem, and we've discussed the scorpions.
And yes, any spraying or eradication should be your landlord's responsibility, but I don't know if that is addressed by law. Your son is old enough to teach what a scorpion is and how dangerous it is. They have those glass paperweights that have real scorpions sealed inside it - that's what we used, and it's part of my son's collection of bug things now.