But unknowingly we did repair of roof like replace missing shingles.and have insurance for this roof shingles separately.

Ideally you want to separate gross rental income at the "top" and have all your expenses, then have at the bottom "cash flow".

We have separately been involved in investment real estate for several years, and we are now planning to start a new business together with intent to invest in long-term multi-unit rental properties in the Carolinas. 

Sell and move on.

Unless you're a sociopath, if you like something, someone else will like it too and want to rent it when/if you move out.

Rent your primary, move to a MF and house hack, rinse, repeat?

I know most wont do that but rental income to me is not going to move the needle when your main income is real estate fee's and building homes etc hard to get excited about 200 a month :) 

If property is not redeemed I get a deed in the mail.REally like this play for assets that are inexpensive.. and your paying cash.. risk is minimal to nill and as long as your play is simply rent and keep very long term.. its a genius move.. most folks are so worried that you have little to no competition..  !!!! 

I have a tenant who has moved out and  i now have a judgement against. 

It also is helpful to have a California LLC in case you ever sell that property and move into another state so that you do not need to form a new LLC altogether with new operating agreement, just re-register in the new state as a new foreign LLC.