Please look at https://www.plasticscm.com/version-control-for-games.html

We are. 2 man team and have our own hackeneyed way, some in house bunch of Python scripts to build our game assets. As we do this seriously as a hobby it works :). But now we are at a stage where the 2 games are coming along well and to go full hog, I would choose plastic.

It has integration with Unity and gutsync as well so migration is easy and with 7$ pm cloud plans for 5gb assets works for us.

Last when I had checked plastic it was out of reach out hobbyist / indie game devs. Hope this helps.