Do they take up much time each month?

I currently don’t own any properties but I hope to buy a duplex in the coming months.

If you go another month then 16% lower would have resulted in more income. 

Equity Created: $550,000 ARV - $409,000 loan balance = $141,000 in equity.Cash Flow: The property rents for $2,950/month, covering all expenses and generating slight positive cash flow.HELOC Potential: Post-refi, I can secure a HELOC up to $86,000 (90% LTV) to fund future investments.

The property has a massive 900+ sq ft attic with very tall ceilings that would make a perfect 3rd unit potentially grossing another $1000 per month. 

You can get some estimates from contractors for what they charge for big ticket items like to renovate a bathroom, renovate a kitchen, replace the furnace, replace the roof, etc.All wholesale deals should have free and clear title and you should be able to see the sales agreement before submitting the earnest money deposit.

Quote from @Kyle Biggs: I'm a investor with 2 rental properties that cash flow $1000 a month.

I'm a very conservative investor and may look through a hundred deals a month, and at the end of the year only invest in 4-5.

I don't have personal experience with it, but when the app was first developed, I contacted the developer and put the app through a fairly robust test usage to see if it's something I would want to recommend to my clients (I'm a CPA).I think the app is great for its intended purpose and I do recommend it to my clients now (and have for about 18 months now). 

I know that the tenant currently makes $33,144 gross a year which would be $2,762 a month.