what services have you used in the past for these types of loans?

The last house he did for me I found out by my cleaner that he was mopping the floor to get a better shot.

I prefer good service over saving 20 bucks a month.

When the time comes will use online services to market the units.

When I realized what happened, I called customer service and humbly inquired about whether they would be willing to extend the 0% interest promotion once more given my stellar payment history with the bank.

Typical service call is 60Bucks for me.

During your due diligence you'll want to back up the financials with one year's utility bills, copies of the service contracts, and a lease-file audit (comparing the leases to the rent roll).  

There are plenty of services you can subscribe to to get even better data than the MLS because they give you all sales, not just sales through the MLS. 

A good goal would be to work up to 6 to 9 months of debt service in reserves. 

What kind of due diligence services do you provide?