One of the benefits here is that you can save a bit on closing costs but the PPP (pre-payment penalty) structure may be more aggressive, ultimately inhibiting your ability to sell off if needed - since the loan would need to sustain a minimum debt service.

Talking to lenders for pre-approval letters.  

Practice these answers until they roll off the tongue.

I could roll over those amounts into another Roth IRA of my choosing.

Once you have your quote sheet and your pre-approval letter then you make your offer. 

If your income exceeds $150,000, your ability to deduct passive losses from rental properties is limited, and any disallowed losses carry forward to future years under the passive activity loss rules.Yes, the deductions can accumulate and roll over year after year.

Obtained a “pre inheritance” from their aunt7.

As for doors, we learned the manufacturers sell to distributors for pre-hung frame manufacture.

We then wholesale it to me, I get a mortgage (I've been pre approved by several companies for 500k) for 400k and take possession as my primary residence, pay back the hard loan, (350 all in for 9 months) and split the difference.

You might consider rolling your Traditional IRA over into a Solo 401k and purchasing a property with debt, instead of IRA.