Sell a rental for liquidity/future rental opportunities, or no?

[Ryan Thomas]

Ok, so here's the situation: I've got 3 rentals, and I have an offer for a house I paid 79k for for 125k. I owe 72k, so that gives me 53k to play with. Taxes will be ~$6500, so that leaves me with 46.5k in pocket, free and clear.

I cash flow--after taxes, mortgage, maintenance, everything--about 380/month with the property, so it'd take me 10.2 years to make 46.5k in profit assuming (assuming rent doesn't increase or costs go up--big assumption, I know, but I can only work with the data I have now). 

I plan on buying land so I can build, and then turning my current house into a rental, which would probably cash flow ALOT; I bought bottom of the market and have a 2.99% rate on the mortgage, and it will probably cash flow about 800/month after taxes, mortgage, insurance, and maintenance. That aside, my thought is that liquidity right now is probably a good thing to have at the moment, as there will likely be some good buying opportunities in the near future, no?

It seems like a no-brainer to me...only way I get screwed is if costs to build go up SIGNIFICANTLY in the next year. Am I missing anything? I'll note that in my area, 46.5k can actually buy a nice piece of land and is a decent amount of $$. It's a cheap(er) area.