If you can offer a nice unit that is updated for slightly lower than market value, it is going to keep your vacancy rate at a near 2% per year. 

As others have mentioned, you typically need some liquid capital to get a deal done even if a hard money lender was funding 100% of the deal for you. 

Here are some questions that I would typically ask a CPA:Are you experienced in working with my industry?

Since acquiring a four-unit property on the Northwest side, my bi-monthly bill has typically been around $500.

For example, the insurance company offers you $100k.

Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Quote from @Clayton Silva: Quote from @Jeffrey Blackman: Quote from @Clayton Silva: 2nd position HELOCS on investment properties are typically capped at 70% LTV and have rates ranging from 9-11% just a heads up unless you use a local credit union where you have cash on deposit with them. 

Otherwise, that area typically moves decently.  

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

You can typically count 75% of the previous rental income (from the units you will not live in) toward your qualifying income.