In need of contractor recommendations

[Bei He]

Hi everyone,

I'm considering a couple options

1) getting a tiny house on wheels in the backyard -- San Jose now can officially get it permitted -- then I'll just add a bathroom and shower in my garage for family use, thinking no need to permit this. or 
2) converting my garage to JADU and get it permitted. 

Need a few contractor suggestion and if anyone have similar project cost info for my budgeting purpose, that would be greatly appreciated.

1) tiny house on wheel in the backyard. 

Need contractor for trees removal, prepare electrical and plumbing (water & sewage) connection with main house and prep a flat ground for the tiny house on wheels Need contractor for adding a bathroom and shower in the garage, some dry wall work and plumbing, then tile & finish 
if you have different recommendation for different job, I'm ok to be the project manager my self =)

2) converting garage to JADU --  This I probably will look for a contractor can do everything including permit.

any suggestion greatly appreciated!

Location: San Jose CA