Although there are companies who use lower standards (paneled walls, presswood floors, etc), the companies I have worked with in Florida use higher end materials like tongue and groove plywood floors, 100% drywall construction with 2x6 walls, spray foam wall insulation, granite counter tops, etc...and then we delivered them in 2 pieces via semi truck (or as many as 8 pieces depending on size and number of floors).

Here's what the quote covers:- Conversion of 2 bedroom, 1 bath main house to 3 bedroom, 2 bath (~1040 sf footprint)- Demolition of existing walls (existing dining room wall, wall between kitchen and living, bathroom closet)- Finished Shell (Reframing opening to living room and kitchen, shifting openings for bathroom/bedroom, new walls at bathroom and dining, level - Replace all aluminum windows with fiberglass windows and screens- Upsizing plumbing, and relocating fixture locations as necessary- Upgrading electrical panels- Assume heat pump and ductless mini-split for heating and cooling- An allowance for kitchen appliances including combination range, hood, dishwasher, microwave, refrigerator, and washer/dryer- An allowance for mid-grade plumbing and lighting fixtures (Delta, Kohler, or equivalent)- Mid-grade plumbing and lighting fixtures (Delta, Kohler, or equivalent)- Ikea cabinets or equivalent with solid surface countertops, includes island- Assume solar system to be installed on the house including battery storageFor the garage ADU, the garage would need to be demoed and rebuilt, but we would benefit from building within the setback since the garage is on the property lines.

We invested about 20K in repairs and did the work ourselves.We were left with a home with LVT flooring throughout, a new kitchen with granite counter-tops, new cabinets, and appliances.

1/4 drywall over popcorn ceilings and wallpaperMudjacking can be an alternative to replacing concrete in some cases.Resurface old tile, tubs, and countertops if they're in good shapeDefinitely vinyl plank in rentalsNew scratch and dent appliances, if you can find them.Amazon for pretty much all plumbing and electrical fixturesRip down  3/8 plywood for cheap shiplap.Using contractors who are budget conscience can save a ton.

You could even do a simply kitchen or bath remodel like new cabinets and counter tops.   

Updated kitchen granite countertops. 

New LVP flooring upstairs to replace all the carpet, new cabinets and countertops in the 2.5 bathrooms, new fiberglass shower in the guest bathroom, new walk in shower (tiled) in the master bathroom, next lights/sinks/faucets/toilets/etc in all bathrooms, new paint on kitchen cabinets, new pulls on kitchen cabinets, new ceiling fans throughout, and fresh paint throughout.

Granite countertops and new stainless steel appliance.

Painted whole home, new flooring, painted cabinets and new counter tops, finished basement.

The renovations included new flooring, fresh paint, a new HVAC system, updated bathrooms, and the addition of stainless steel appliances and granite countertops.