We did new construction in the eighties and after needing $50.00 more per unit the builder put the job up for bids. The best price she got was the same as ours with no semi gloss, everthing flat (we did kitchen, bath and trim in semi). So she came back to us but we had already commited to a property management company for repaints on 400 rentals they had. Made more money, got paid faster, and never looked back.
As a whole our area builders want it done as cheap as possible. The guys getting the work come on the job with a van load of illegals that get paid little, and get paid under the table (saves taxes, ins, workmans comp, ect). It really had depressed wages for painters doing new work.
That said, repaints in partcular and comercial in general are not dependant on a "housing boom" or slow down significantly when the "bubble bursts" and we get better money, some up front, never have to carry the balance for 30-60 or 90 days and homeowners refer us to thier social network.
Can you make money in new constuction? Absolutely! Is the work somewhat easier? Yes, but we make more in residential repaints. (higher profit margins)
Our long term goal is to actually have some of all that business and keep great employees busy all the time.
Here is the best advice I can give you for building a residential client base. If you only work for one builder (you and your wife right?), and that builder runs out of work or cuts your throat for a lower price, where do you turn? You didn't build up a client base by staying on his work for months/years did you? So you eaither have to beat the lower price or slep around begging for work.
The painters with a large and diverse client base may get slow at certain times, but his work is not dependant on the whims of a builder doing new construction.
Not a knock against builders, do work for some custom guys, just don't hang my success around thier necks.