Lending partner for investment plan or property?

[J.C. Martel]

I want to scale my RE investments. I've been investing for 15 years with rentals, flips and BRRR. Now I'm down to only 1 rental, $200k HELOC on my primary, 800+ credit score, and a high income job.

I am looking for how to bring in a lender partner that I can work with on multiple deals, single or multi family. But I haven’t identified the properties yet, which lenders usually want to see through a formal application. 

Will lenders entertain an early-stage conversation about how much I can potentially borrow across a few different properties? What is the best way to prepare for that conversation? It seems like loan products for investors have higher interest, so any advice on how get the best rates, ie which banks/lenders?