Personally, I would go for the UDM pro and some of their U6 AP's. That UDM pro can act as the controller for all of the unifi devices + a security gateway + router + 8port gig switch. We use Unifi equipment at work and I love it.
Most gaming chairs are just... not very nice to sit in. I would look for a place near you that re-sells used office furniture or the equivalent to Facebook marketplace / Craigslist.