Hi ben and welcome to the forum
The mortgage companies for your properties are entitled to commence possession proceedings against you when at least three mortgage repayments have been missed. So you are a couple of months away from that.
If your self-employed business is never going to pick up, then looking for a job to provide you with instant income has to be the ultimate priority. Your houses may sell eventually, but they will not produce instant cash, and I assume that you are being supporting by ongoing lines of credit at the moment.
An IVA could serve to hold the position (based upon the sale of your properties) - and at least interest would not continue to accrue - whilst your properties are properly marketed. How much equity do you have in all of them?
You could also consider bankruptcy proceedings, if the equity is insignificant, but this may hamper your search for alternative employment in certain industry sector. What line of business are you in?
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk