Hi J.,
I hate chemicals too. We use natural stuff to rid our home of bugs. One thing we found that really works on ants is to get some ZOTE soap, grate it, mix it with water and spray or pour on the problem. It kills fireants,sugar ants, etc. ZOTE is hard to find. Wal-Mart used to sell it, but now they don't. It comes from Mexico, so if you have a Mexican Market, look there. In San Antonio, I hear that the Culebra Market carries it.
If you have fleas or tics, use Diatomaceous Earth (DE) from a feed store. It is a fine dust (do not breath it in) of diatoms from the ocean. It is not a chemical. You can mix it with water and spray, or you can use it like 7 Dust. It won't hurt animals, etc. It works because it is like finely ground glass and it cuts thru their protective coating and they dehydrate and die. It is actually better than having a pest control company spray. As for roaches, use boric acid powder.
Did you know that IVORY soap kills fleas? If your dog has fleas, there is no need to buy a special flea soap. Just use IVORY. They all die and go down the drain.