In Need of Alot of Advice

[rocketlily]

I currently have a 20 gal SW tank with a Nano Skimmer, 2 Korila powerheads, 150 watt heater, 150 MH light, approx 30 lbs live rock, 1 Yellow tailed Blue Damsel, 1 Cleaner Shrimp, 1 Emerald Crab, 2 Turbo snail, 3 Margarita snails, Flourescant green acro, mushrooms, zoas, Duncanopsammia, Clove coral and GSP. During times when it is very hot outside, I have a little trouble keeping the temperature down.

I am currently building a 95ish tank, and have the following equipment, ASM G2 skimmer, 2 200 watt Stealth heaters, 2 Quiet One 4000 pumps and a 36" Outer Orbit with 2-250 MH lights and 4 T5's.

My pond fish went outside, leaving me with an empty 36" 50 gal tank, stand and Eheim 2215 Canister Filter. This will be empty until next October and the new SW 95ish tank will not be ready, live rock cured and cycled until Sept or Oct.

I was thinking of transferring the contents of the 20 gal to the 50 gal. The light will fit but the Nano skimmer will not do. The 50 gal is not drilled, nor do I want to drill it for an overflow. What would you recommend I do for a skimmer for 3-4 months? How would you handle the transferring of the stock and adding more water. I currently do a 15 liter change every week. (I will not be adding any new live rock to this tank). There is no room for a sump in the stand below the 50 gal.

Any help and suggestions you can give me on this would be very much appreciated.