Get one of those 100 gallon rubbermaid agriculture tanks to keep your livestock in during the transition. I use one for makeup water for water changes - always handy to have around. Someone was selling one recently on MAAST.

Setting up another tank is exciting and hair pulling at the same time. I purchased a used tank when I upgraded and it still took several weeks to get the plumbing and electrical worked out. Thought it would never end.

Instead of replacing the front glass and if you had enough space, your current tank would make a kick ***** sump.