I use the bus if not being picked up, €11 if booked in advance / paid online and you can print the ticket, picks up directly outside the terminal and can be dropped at Arc de Triomphe / Invalides etc. RER train/Metro is a pita to change if you have luggage and you need coins to buy the tickets from memory (I go regularly and have a metro carnet of 10 trips which lasts me more than a year).
I would guess Uber will be a lot cheaper than €60 and any cab (eg G7) shouldn’t be more than that and will take three people.
EDIT: just asked the wife (Parisean) uses a shared taxi service known as “the shuttle” which does multiple pickup which is around €18 per person so not much different than you hotel car option