Time and practice will still teach you as you do deals but it will help you understand what things costs for the size of the property 

That way the lender has an idea what it is you are doing and cost.

If I were to purchase an Airstream to use as lodging while I travel across the US to my rental properties, make repairs, and perform lease turnovers, would I be able to not only deduct fuel and campground costs but also depreciate the purchase price across 5 years? 

My thinking immediately turned to researching local rental costs per square foot to determine income potential with triple the current square footage.

Ofcourse my mistakes would cost me if done all my self as well.So i am thinking that by going through paid consulting, it saves me from mistakes and time.

This can often be cost-prohibitive. 

This allowed me to control renovation costs, streamline operations, and accelerate my investment growth.

This is my personal opinion, which probably won't be popular.If you are worried about the cost of hiring an attorney to create a proper operating agreement for your LLC, you probably don't need an LLC, and if you choose to use an online site to create an LLC, you probably get the protection you paid for.

The two deals with friends both ended poorly with friendships ruined and tens of thousands in legal fees and court costs.

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.