Here is the thing about mods as has been pointed out. They do not add any value to your car. Not one penny. (usually) So knowing that, do not add any mod you cannot undo. When you go to sell your car take off all your mods and resell the parts. You can get $.50 to a dollar or more. Doing that cuts your costs in half. Doing the most popular mods with the most popular parts helps even more.
Mod smart. Have fun.