I would never do gloss on walls. Overall I prefer less shine. Flat on ceilings, unless you're doing some really glam reflective treatment; it is less expensive. I use matte for my walls, which not reflective but it is washable. Satin is my choice for trim and interior doors. For outside doors and shutters I use semi-gloss.

Dark color doors and trim with light color on the walls

Hi HU-347783373 , good for you starting this journey! As your finding out, one choice opens another issue. A typical construction order of operations for you to navigate would be: 1) floor & baseboard installation 2) ceiling (you'll be painting that too?) 4) fixtures (this would be the time to change any lights) 5) finishes (walls, painting base) To avoid a long period of shuffling boxes & waiting, how long would you have to wait before you had the money for the whole project? Only other options I see involves overlaying something real thin on your exist'g floor, or removing the finished floor down to the sub-floor, and building up. Kind of a lot of acrobats to avoid a new base. Renovating can be a bit of a rabbit-hole, so we give every project a 15 minute assessment, free. Hit us up. Thanks, -f

How high are your ceilings? Those quotes including for paint are quite low. Everyone has an impression painting is easy. No. For a quality job that will last at least 5-7 years it is small price to pay. I have a quick way I calculate ballpark in this area $300 a wall and that includes labor and paint but for 9’ ceilings. Higher ceilings add according to height. It averages out pretty well. 2 coats and protection for floors and furniture and clean up. I use SW and sometimes BM for special colors and flat finish on walls. Satin finish on trims and doors etc. I use ProMar200 zero VOC and BM Aura. BM most expensive. Wait for sales on both.