Some see that as a benefit, I see it as a disadvantage.  

So, there is one disadvantage besides asset protection. 

Is it a bad idea to purchase a rental or a flip on contract for deed?What should I be aware concerning the contract itself?As a noob investor, is there anything else I should now about CFD?

Certainly that's a safer approach for the buyer, but could easily put him at a disadvantage relative to more experienced flippers who can complete the due diligence quickly and make offers with few, if any, contingencies. 

Dear friends,Please give me suggestion.I am from Armenia and a lot of members of our society think that per day renting process has many disadvantages , because tenants can injure the apartment.Is it beneficial that rent the apartment and give it on airbnb for per day?

However you'd be out the LLC filing fees in the latter situation, so the LLC would appear to be disadvantageous if viewed solely through the lens of income tax compliance.If you're looking to avoid tax I'd suggest you read up on a "like-kind exchange" aka a "1031 exchange". 

From your experiences, what are the advantages and disadvantages of being both an Investor and Realtor in the DC, MD, VA area?  

You are correct in stating that the disadvantages are often overlooked.  

If not it might be worth looking into going to another bank or CU that does have a promotional first year rate to open a new HELOC with.Some other advantages or disadvantages of the HELOC could be that you wouldn't have a draw schedule or fund control requirement that you'd likely have with a construction loan, which can be laborious.

In my opinion, this is a major disadvantage to setting up a Solo 401k with most custodians.