@Xi GuoI wouldn't go into it UNLESS you have an unfair advantage and a long term plan.It is possible to create a haven for honorable people, however you have to stick around long enough to earn a leadership role.This is not a flip and it's not an ATM machine.

The seller receives an appraisal in order to select a price for the home, and the buyer gets one to confirm that the selling price is fair.

But if owning your own home is priority, then take advantage of the 3% FHA down payment program.You will have a very tough time finding a cash flowing property in CA, unless it's in not so good location.

What are the  advantages and disadvantages  using this strategy ?

You could take advantage of that vs blindly bail.

The lender is going to want to order the appraisal from an appraiser it has already selected and or done business with.

This isn't a "don't let the tenant take advantage/it's not essential/don't get pushed around" question.The only question you need concern yourself with is this:  Is the siding dirty?

Also, using a service like this allows you to host your website at the same time.Here's a quick flow of how the Internets work for this:Buy your domain name (GoDaddy or someone less evil)Select your hosting provider (GoDaddy, HostGator or someone less evil)Point your DNS from GoDaddy to HostGatorLog into HostGator and create your e-mail accountsUse whatever you want to check them (Outlook, Thunderbird, Firefox, Chrome, etc.)

This is good information to know because I think taking advantage of the FHA with more units just makes sense if the numbers do as well. 

The only advantage I can see to individual sheds as opposed to self storage steel and masonry buildings is that you can scale slowly, by buying new sheds only as you need them.In every other way, cheap wooden sheds are going to be inferior to a storage building, and that will probably be reflected in the rent you can charge.