You are off to a great start because you know you don't want to LEAVE your job to do real estate, you want real estate to be a sufficient side car to the job you are already crushing out of the gate.

Dedicate sufficient working capital to your business 6.

This will give you an idea of where you can be priced at with factual data rather than guessing a 3%. 3% could be sufficient but the data will help you be confident in your decision. 

@Michelle SharkoAnswering questions in step by step fashion:- Is it a good thing to do or not is a personal finance decision and it depends on the person asking it, their risk tolerance which in part has to do with how this HELOC or line of credit works and how your personality fares relative to taking on new debt (a person more adverse to debt might have sufficient savings and temperament to pay down/back the debt versus a financially liberal person might get in over their skii's as).

If their credit history is sufficiently long to generate a reasonable score for them then the credit score tells you the answer! 

A higher ratio (typically above 1.0) indicates that the property generates sufficient income to cover the debt, making it a lower-risk investment for lenders.3.

Otherwise taking detailed videos and pictures for the contractor to get a good idea of budget should be sufficient to get a realistic budget. 

If your account does not have sufficient funds to acquire a property entirely, you can look into a non-recourse loan. 

You can also buy a Landlord Forms package from Biggerpockets, me, or find one online and hope it's sufficient and legal.You don't need an app to manage your property.

A Mortgagee nor a Deed of Trust Trustee carries out the auction themselves.The result of the auction is (a) no bid exceeds the minimal amount of reserve to the Mortgagee thus the Mortgage/DOT will be extinguished and the Mortgagee will receive title to the real property, (b) a bid is sufficient to exceed the minimal amount of reserves to the Mortgagee thus the Mortgagee's debt is paid, extinguished and title passes to the bidder who made said bid.