As for GridCoin, there are few approaches, I suggest starting with https://www.gridcoin.us/ guide. I am not doing anything so special that you can't do by just setting up a Boinc Miner on each computer, and the wallet on one of them. If you need help advertising CPID, just let me know. Basically you can count on me for any help in setup process.

As for XRP, I am not sure if there is any profit out of it. I do host one node, but that's for testing purpose as one of my clients is considering to start using blockchain for money transactions, and logically XRP is one of the platforms of consideration.

But if you need help with that as well, feel free to ask at anytime. You can do here, or DM me on twitter (Link in my introduction post).