Costs are pretty high for HIPAA compliant ones...considering I may need to fax on average once every 3 months.  

Respond to the notice you received with a letter saying that you inadvertently failed to file the extension, because this is the first year you are filing the return for your company, and promise to be compliant going forward. 

Are they compliant with CURRENT codes?

In all states, rent to own arrangements are no longer compliant with federal financing requirements.

Actually  if I can persuade my tenants  to meet their obligation to pay rent without resorting to  the processes and procedures that you cite I have far more control of my business than you do.Once you file proceedings against a non-compliant tenant  - You are not in control of the court date - the listing clerk is.You are not in control of the outcome of the eviction hearing - the judge is.You are not in control of the eviction date - the sherriff is.In addition your own house is off limits for security reasons and for fear of something happening that prejudices the ongoing litigation. 

Of course you have to make sure they are compliant because your license is on the line.

Sure it's possible, but a compliant buyer network is rarely acquired through social media.

Not all contractors are compliant.

You should make sure whatever forms you have are designed for your area and compliant with your area's laws,  else they could cause you a lot of trouble down the road.   

You don't want to fall out of contract because a lender 5 states away didn't know how local transfer taxes work, didn't disclose it properly, and now at the 11th hour has to "re-originate" your loan file from scratch to remain compliant, but oh wait the seller isn't going to wait around for that when they have a backup offer $25k higher than yours in their back pocket!