@Mario Morales - As some others have said I think the strategy is sound, but the key would be to find a distressed property that you can drive up the value with renovations so that the new value is 25% higher than the purchase price so you pay back your HELOC.

Review their management agreement.

Great value here 

Property values also has increased due to the lack of inventory.

I'm currently finishing up a duplex in William Land Park, where rents will cover costs, but the value add and forced appreciation will give me $250k in equity.

Avantstay's services cost money because they provide value.

Rockefeller understood the value of real estate, owning landmark properties like Rockefeller Center.

I wasn't planning on going this big for my first investment but the deal, location and potential to value add was too good to not go for it.Thank you! 

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.

Which I GET means that someone's numbers will work if they have different values for their assumptions.