I also use Baselane for banking and accounting because you can mark each transaction with a tag. 

I just need to know is there any type of private lenders who specialize in much larger transactions with having windows on time of finish which I estimated at around 2 years.

It’s simple, brief and the right pair doubles your money each transaction.

Your experience with the DSCR loan process sounds frustrating, but it's not entirely uncommon for borrowers to encounter last-minute changes, especially in complex transactions like cash-out refinances. 

Uncertainty in Case of Disputes: Without the backing of a banking license, resolving disputes or seeking recourse for unauthorized transactions or errors may be more complicated.

If you're not familiar with the sales process for this property type, doing your own due diligence, the right lenders to use  and what to look out for, how to negotiate and how to work with commercial brokers, I'd recommend having a good buyer's agent help you out on a few transactions before going straight to the listing agent!   

The point being is that a lender that gouges a client is either getting their capital at a higher cost or they view the lender and borrower relationship as transactional and don’t see the lifetime value of the relationship, in my opinion. 

The only change is you're not working with a bank for this transaction (and, there are so many benefits from that).Ensure you have an easy and smooth way to pay your monthly payment to the seller/lender since you'll be working directly with the seller on that rather than a bank.

AirDNA (I always check multiple places) says this property could make a $500 average daily rate (ADR), with 65% occupancy as a basis.I pulled up the new BiggerPockets STR calculator spreadsheet and realized this might be a winner.After entering all of my research numbers, it shows a potential CoC of 12.49%, a monthly profit of $14,385, and expenses of $12,442 (even with a 15% management fee).

Multi-family properties are a much stronger investment in Tampa compared to condos, especially because of the headaches with condo HOA fees—out of the 3,500 transactions I’ve done over the past 20 years, the only long-term losses I’ve had were with condos.