GD Version2

Hi. 2 quick questions:

I would like to update to Version 2. I am still building a website so can I just uninstall the old version and its add-ons and then install version 2 with the new add-ons ? Would this be ok or will it leave some type of files on my system that would conflict with version 2 files? This seems to be easier then using the conversion tool.

Second question:

I am using Cloudways. I have GeoDirectory installed on the server. I also have Peepso (a buddypress like) social community plugin installed as well. Now as the site grows I am fearful that having both of these plugins (GD and Peepso) will slow my site down. There would be tons of requests made and may slow and crash the website. So, would it be ok if I had GD on one server and then made a subdomain for Peepso (like community.mywebsite.com) and put that on ANOTHER server. Members would just click on the community link on my menu and taken to the other server. This way GD would have more room to grow and less chances of slowing down the website. How does this sound? By the way Peepso is not multisite compatible. And I understand people would have to probably log into the community site again.
Does this sound like a good idea or is there a better way of doing this? How are people using GD with Buddypress or other resource hungry plugins?