First thing's first.

Forward every one of those texts to an email address, where you can print them off. If you go to court, a judge will love that.

Second. Can you afford a lawyer more, or losing a house more?

Lesser of two evils here. If you take it to court, a judge will probably require you to sell the house and split the equity, or balance on the mortgage, according to the division ordered for all other assets and liabilities.