Cardude, I think your boat could be a good candidate for a stabilizing sail. If I were you, I would find an old daysail boat about 14 or 16 feet long and "borrow" the rig. Just lash everything temporarily (but firmly) and then go try it out. If you like it you will be armed with much better information when it comes time to do a permenant rig.
Like Panope, I see that your boat has a pilothouse that is quite far aft. For me this means that with a small headsail only, the boat is nicely balanced. If yours is also reasonably balanceable with a forward sail, then you have the option of using a roller furling jib that will make handling sail much easier.
If I visualize my boat without a mast, I see a trawler.