>If $7-10K is a minimum for a one month app, does that mean that you usually only _have_ to work 6-7 months out of the year to make a decent profit, or that you are only _able_ to pull contracts for about 6-7 months out of the year?

That definition is unique to each company.

Here for example, I have to pay some expenses for the servers, the connection lines, the domains, etc.

It also depends on the rate of the consultant. It also depends on the region you are located. Some US rates are double as oppose to other places.

Other factors might also be involved.