The best HELOC on a rental is with Pen Fed Credit Union.

Found the best financing terms through commercial loan with a local credit union.

However, some smaller local banks and credit unions will offer a secured line of credit for 70%ish LTV and will place a lien on the home as security, however you have no payments if you don't use the funds, and rates are pretty reasonable (I'm at 5.5%).

https://www.courier-journal.com/story/money/companies/2019/08/29/ford-motor-co-invest-millions-louisville-kentucky-assembly-plant/2124179001/This is actually pretty important because their is always a threat of the unioning calling a strike.

It also purchased a stake in PMI Group, a provider of private mortgage insurance to the credit union industry.

I am located in Union County if you are ever in the area.Anthony

He was a nice guy, and gave me a soft-sell of all the benefits of having a personal relationship with a full-service bank (currently I bank at a credit union).  

I use a small community bank and credit union for most of my SFR deals I've done because they are able to be more flexible in their lending structures than, say, Bank of America. 

I'll give you a quick run down on the closing costs from a duplex I purchased for 250K:Loan origination charge: $750 (this may be 1% of the PP, however we went through a credit union on this one)Appraisal fee: $275 (I've seen this fee go closer to $600 on some purchases )Credit Report: $11Tax Service Fee: $70Flood Cert: $9Title Services and Lenders Title Insurance: $1,520Owners Title insurance: $271Government Recording Charges: $92Transfer Taxes: $519Your pre-paids and taxes will depend on how you set it up. 

I would of course be able to provide a pre-approval letter for financing from a conventional bank or credit union.