The actual cost of materials to install french drain in interior is
pretty low, that cheap flexible black plastic corrugated drain pipe, a
pile of gravel bought at a supply yard, some concrete to replace
removed areas of floor, rental of a jackhammer a sup pit and pump some
PVC drain pipe.

Its not rocket science a nice DIY project. mostly moving junk most
have filling their basements.... you can do one area at a time if
thats a issue

but once its done your homes value increases