I need some (safe) heat, stat!

[Ryan Kurth]

Well, we have almost completed an extended rehab - new innards, finished a 950 SF basement, stopped flooding etc. (really wished I started a deal diary of this one!) and have run into a snag.

The HVAC needs some repair/maintenance work, and we aren't getting heat into the building. We are trying to keep our drywall guy working to stay on schedule, and wonder if anyone has a cost effective and sage recommendation on getting ~2,000 SF heated? We've ran through a few different ideas this morning, including just waiting it out, but just on here making sure there's not something obvious we're missing. 

Thanks in advance,