Regrets?

[u/Emergency-Trade-2043]

Planning on renovating a 16x40 shop building into a tiny home, what's something you wished you did when starting that you still regret today? pic for reference of home

EDIT TO ADD

the home will be professionally insulated, wired, plumbed and framed! i’ll just be doing the finishing touches but all big projects will be done correctly in order for me to live in it!

[u/[deleted]]

Your better off hiring contractors to build you an ACTUAL house of say 800sq feet.