Thanks for your very valuable answer, please read more details i

Thanks for your very valuable answer. It's good to get help from experts like you.

I will do the management myself. He will fix the problem (he cannot speak English). He said he can do everything from plumbing to electric wiring, from carpentering to roofing. If there is anything we need to ask other labors to help, the cost will be deducted from his $100 or he needs to invest his money out from his pocket (if $100 is not enough). He can also ask help from other friends of his.