I love finding VA Assumption Loan deals and have personally secured one so far as a rental property with a 3.3% interest rate. 

Learned that I needed a realtor that was local to the property location.

They are even working on getting me the evicted tenant's security deposit, the missing JANUARY rent since the place is still empty, and covering the cost of my own manager re-listing the property.

Yes, as S-Corp owners receiving W-2 wages, employee deferrals to a Solo 401(k) are subject to FICA taxes (Social Security & Medicare).

A mix of short- and long-term strategies could hedge against market shifts.Borrowing allows you to scale faster, especially if you can secure favorable terms.

Unless the medical condition meets the state criteria for early termination and that the medical notice does not appear to suggest that, you cannot terminate the lease outright/immediately but that you will begin to market the property for rental and upon securing an acceptable tenant, the lease can be terminated pending a satisfactory property walkthrough indicating no damages. 

You can not do a pet deposit unless your security deposit is less then 1 months rent.

You can borrow  against a 401k or another property you own for example, but that would a secured loan.

Over-budgeting is critical to ensure that renovations don’t eat into your profits.Market Fluctuations: If property values in your area do not appreciate as expected, or if you face a market downturn, the amount you can refinance for may be lower than anticipated.Financing Challenges: Securing financing for the initial purchase and rehab, as well as refinancing after the property is rehabbed, may be challenging, particularly if the property is located in an area with fluctuating values or if the rehab work doesn’t immediately improve the property’s appraised value.Tenant Risk: Rent collection and tenant management can be unpredictable.

Quote from @Keilon Morton: I am looking to secure my first tax sale and need another investor to go in on the deal.