In my opinion, if you want to keep it cheap...er, then I suggest two 40mm motors. Leopard or SSS would be a good choice. The TP Power are very nice but expensive. The catamarans don’t have much drag so that helps depending on weight which will obviously increase as you add parts. Lower kv motors on more power would be best. The problem is that lower KV motors would require higher amp ESCs with larger batteries and that makes the price jump substantially. If you can get away with 2-4082 or 4092 motors 1600 to 1800kv that can run on 2-180a Seaking ESCs you could use 4-3s or 2-6s lipos to run it. It should be very fast with that setup and should be less than $400 plus batteries, mounts, servo etc.