The fact that you owe a mere $5k on your house is strong evidence to me that you can handle a reasonably-sized new mortgage. You are to be congratulated.
The Federal Reserve meets again on Jan. 29 or 30th, and talk is mighty strong there will be another cut to the Fed's "benchmark interest rate." I expect it's likely this will affect 15 and 30-year mortgage interest rates in your favor. Google and you might find more on this. But it's been a funny time for interest rates, with what's known as the "bond yield curve" being partially inverted (and this being an anomaly, so no guarantees that the rates will improve still more after Jan. 30.
I would follow Skip's advice to figure how much mortgage I could afford, then run numbers, evaluate possible lenders, etc. until Jan. 31 or so. Finally, watch what the Fed does, and go from there. An interest rate of 5% on a fixed mortgage is certainly attractive, given that stocks have returned quite a bit more historically over 15 year periods. This assumes one does not mind not owning one's house outright.
It's possible you will get a good deal on remodeling contractors in general, as well, since a lot of developers have been slowed down by the oversupply of housing.