$6000 is a large mortgage to cover for a vacancy. 

Sellers may struggle to mentally shift from "owner" to "tenant," which can create challenges with boundaries and property care.Security Deposit:If you’re doing a temporary leaseback, be sure to collect a substantial security deposit to cover potential damages and ensure they vacate on time.

I’ll also amortize large items like roof over 20 yrs, and then add $100/mo/unit for general repairs.

Of course, with all things, the answers to all these matters will depend on the circumstances.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

Maybe even offer to cover some closing costs to sweeten the deal if they’re stuck on a higher price.

Lease Terms: Determine a monthly rent payment that covers the HELOC repayment (interest and principal) while providing some positive cash flow for you.                    

@Anthony Miller here's something to think about that's not covered in any books!

We have had tenants use everything from latex caulk to roofing cement to try to fill nail holes.

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.