Legal Question in Real Estate Law in Florida

I'll try to answer as best as possible, but there is some missing information. First, how did you husband sign (i.e. individually, on behalf of partnership, as Gen. Partner?). Also, is it a true partnership (i.e. official vs. unofficial/implied)? These, and other questions would determine who is liable. Assuming he signed individually, then he (his estate) is responsible. However, if it's deemed he signed as the partnership, then the other partners may be liable. This is why it is important to set up businesses properly from the onset.

Probably not, but it depends. Did he personally guaranteed it as an individual? He should speak with an attorney and have them review the partnership and purchase agreements.