Get a 1u power bar :)
StarTech.com 8 Outlet Horizontal 1U Rack Mount PDU Power Strip for Network Server Racks - Surge Protection - 120V/15A - w/ 6ft Power Cord (RKPW081915) https://www.amazon.com/dp/B0035PS5AE/ref=cm_sw_r_apan_i_04PSTSXHHJ9K3KMP726N
Auto transfer would be nice, but yes too expensive for me. I picked up this Star Tech PDU. Haven't hooked it up yet, but it will be powering my networking equipment and my SFF computer running pfSense.
Wow thats neat! I wonder how hard it would be to modify a 1U PDU like this to be like that