Where to look for funding on small mobile home park

I bought a 5 unit mobile home park in a smaller town about 3 hours from where I live. The numbers on the deal are pretty good, and I was able to take it down on seller financing/private money with no cash out of pocket. 

However, now that I've raised rents slightly and stabilized the property, I am having difficulty finding a lender who will lend on something like this. I've checked with broker's (found one loan product, but at 10% interest on 5 year ARM), I've checked with big and small credit unions including local credit unions and none of them will touch something like this, even on a portfolio loan product. I tried an SBA loan, but they will not finance it because the property has long term leases, and not short term.

I guess at this point, I am looking for private capital, or for a credit union/bank/lender outside of my area that will be able to secure long term financing. Ideal loan amount is ~$275,000. Who's got resources?