Bad customer service (from the partners), unprofessional client information management, ridiculously long underwriting, and I’ll add this..a low-key throwing of their loan officer under the bus for information “he did not know” or “must have been mistaken” about.

Propose starting small, like a single-family rental or house hack, with a clear, low-risk plan to minimize concerns.Leverage your industry connections and offer to handle the initial responsibilities, demonstrating your commitment and capability.

There are thousands of websites out there that are disguised as helping the public find the best of the best but at the end of the day its simply taking your info and selling it to a 3rd party as a lead.If you are trying to buy a home or an investment property and you have good to excellent credit you should always use an FDIC Bank or Credit Union.

Credit score- the higher the best. 760-780+ generally gets best pricing for investment property loans with most lenders.

I have a good credit score and experience in managing multiunits 

Everyone has been spoiled by the last 10+ years of low property values with high rents and low interest rates.- Just ask any investor doing deals prior to 2008 Real Estate Crash!

Also are you doing credit checks through them?

The most important rule is to have the cash flow of the new property be able to pay all its expenses, mortgage, AND the line of credit back.

With the exception of building a trailer on the property (these are hard to finance), this sounds like a good plan AND if you are using it for your business AND your business pays more than 50% of the rent (if you have more than 1 tenant), then this is a more financeable property in the eyes of banks and credit unions as it would be consider a commercial "owner-occupied" property. 

Start with these three key points:Current SituationAssess your current or expected capital and credit within a realistic timeframe.