Given the block this was on which was primarily mix of decent homes and obvious rentals, and this home needed a few thousand in repairs prior to rent, I did not want to pay more than my max 76k offer.

But, you can use it to buy a 2-4 unit (2 unit are much easier then 3 or 4)or house hack a single family meaning live in the house and rent rooms to friend having them pay you mortgage for you.

Make sure they are paying fair compensation to other realtors who will bring you great tenants.   

If I place a super-complainer, or someone that frequently pays late, that cuts into my very thin margins and is my problem...and I don't want folks like that.

If you don't allow them to stay, they will likely need to go to a long term stay hotel or something else similarly expensive PLUS pay for storage for their belongings, PLUS pay to move their belongings twice rather than once.

The unlock code can be automatically emailed and texted to a new tenant after they sign & pay online. 

If trained properly they will free up a lot of time for you, which allows you to do the highest paying activities.3.

You will have made over $50K after expenses and if you rent it long term, you will be paying capital gains on any profit once you sell. 

Got $100k business line of credit with 710 credit score to buy some more properties.Do you think it is better idea to buy a rental house (worth $70k) with the credit card paying all?

That way there is No prepayment penalty and you can pay it off when you refinance the new home or other property.