My niece's husband works construction and they paid cash as they went along. They have a huge beautiful home that him and his friends built from the ground up on evenings and weekends.
One of my other friends worked as an engineer during the day and knock out the wall on the back of their house and built on a huge family room with a fireplace and gorgeous bay windows the kids could sit in and read. His house value went down though, it made it more per square foot than the neighboring homes so it lost per sq. foot value. I don't understand it but since the house had more sq. feet but could not be sold in this neighborhood for much more than the other homes it lost value.
Another friend went through the credit union at their work and had contractors come in and basically add a whole house to their existing house. The new addition had a full basement with 2 bedrooms with windows that can be used as an escape with french drains under them since they are below the ground level, a closet under the stairs that was reinforced to be a store shelter, a large TV room, etc...the main floor was the master suite and a kids bedroom. They also had a laundry room made out of the old master suite with the ironing board, washer and dryer, sewing area, food storage cabinets, large closets for off season wardrobes, a large table top in the middle for folding clothes and the surface was suitable for using a rotary cutter so it was for cutting out quilting scraps and garments. There was a quilting frame suspended from the ceiling too so that if she was working on a quilt of any size she just adjusted the corners to fit the size and she could pull it up or down when she wanted to work on it.
She got her dream home and it was easy. Well, we were there practicing for our singing group the day they broke ground, While we were singing the man came to the window and knocked to get her attention. She left the piano and went out in the back yard. When she came in she had a sill grin on her face...she said "We are not hooked up to city sewer...we have a septic tank". The house was sitting on99% of an acre and when it was built that was sufficient to have a septic tank.
The house had been sold to them and to the previous owners as being on city sewers. They had been paying for sewer all that time. They got a huge refund from the city, so did the previous owners and then the ones who had missed informing the Realtor when they sold it got to pay fines and penalties for not informing the Realtor of their mistake.
They didn't have to pay too much extra to get on city sewer which they did go ahead and do.
So, remodels can be done okay, they can be a hassle, they can be a huge mess that is not worth it, they can even devalue your home in the event it needs to be sold.
SO you need to find what works for you and go with it.