I have a handyman who does counter tops, floors, toilets, and myriad other jobs, and a semi-retired painter and his housecleaner wife are a great combination I call on when a unit goes empty, and can do drywall and counter top work too.

Prices will vary considerably based upon who does the work and where you're located.If you don't already have a good relationship with a plumber, electrician, drywall guy, painter, floor guy, cabinet manufacturer, countertops, tile guy, trim carpenter, and insulation company...

I had my painter come in and paint (he is a personal friend) and I went in the next morning and the entire house smells like vomit

My painter had it from a previous job and sold me 10 Gl for $35.

sure, if you are painting anyway, your painters can probably take them off and put them back on for you for not much extra.  

For instance, a great question to ask a painter is how they like to paint pop corn ceilings.

This is sticky territory so make sure you're careful with verbage.Any painter or contractor who might interact with paint pre-1981 (I think that's the date) is supposed to know the basics of these guidelines and actually be certified every 5 years.

Ahmed I don't have advice as far as flipping houses but as a builder and painter i know you get what you pay for.

I'd then find a handyman or painter to come in and tape off the cabinets, windows and doors and shoot the entire home with Kilz-oil based paint - including the floors.

I once pulled over to get a painter's number while I was looking at property in a neighborhood and saw him painting the exterior of a different house on the block.