So if i again claim active participation on my rental properties, and apply all my losses and include suspended losses from 2019, i will have zero income before standard deduction.

I have had several recent bookings for March and April and it is quickly filling up no different than any other year.I don't think a SBA loan would apply here.

Since it's a personal guarantee would it be best if I paid down some of my personal debt before applying for business credit? 

An engaged couple has applied to rent.

The usual disclaimers apply - not a lawyer, not legal advice, very important that you consult your own legal counsel on these matters. 

Do I apply for financing with lenders for conventional and see if I can qualify (another hard ding on my credit) or do I go straight to Hard money lending/ seller financing. 

Over the past year, I’ve applied for a PLOC a couple of times with banks like Wells Fargo and Suntrust that advertise unsecured PLOCs up to 100k (plenty for my market) and I keep getting denied.

The repayment terms for a 401k participant loan are equal monthly/quarterly payments of principal and interest (typically prime plus 1%) over a 5 year term (longer if used to acquire your principal residence).Please note that if you take a full $50,000 and then pay back the loan, you can't take another $50,000 until 12 months after the first loan was fully paid back.Per the loan offset rules that went into effect with the 2018 Tax and Job Act: if you leave your job and the loan is current at the time you leave your job but then the loan goes into default because you left your job, you will have until your tax return deadline (including any timely filed extension) to make the loan current by depositing the outstanding balance into an IRA (and thereby avoid the taxes and penalties that would otherwise apply).Please keep in mind the multiple loan rules:Under those rules, the sum of the balances of a participant's outstanding 401k loans under a single 401k plan (using the highest outstanding balance of each loan over the last 12 months) can't exceed 50% or $50,000 whichever is less.

The banks will just apply 100% of the 200k from the sell of the one property, against the loan till the loan is paid in full.

Consider the fact that  more than likely  those who had already applied with a broker or bank and already  had their documents in a file were able to take advantage Of this very short lived rate bonus.