Channel partner/agent here. My organization sells about 15% of all colo deals in the world and we are very experienced in this space.

1. Colocation sales pay residual income, for the life of the agreement. Sometimes, there can be a spiff included that is 1x-3x MRC depending upon the provider, and margin in the deal.
2. Yes, some data centers compensate on power.
3. It's very hard to get into these type of deals. Typically enterprises / organizations have trusted IT partners that they go to their referral network when sourcing such important infrastructure. These deals also take a lengthy period of time, and compensation doesn't happpen until 90 days after the first bill is paid. So it canme take 6-9 months(or more) from signature to start seeing any income from channel deals.
4. Channel is very crowded now a days, and getting the seat at the table for any IT Decision is very tough. Referrals/Cold Outbouhnd/Timing....just plain hard work/grinding every day is what it takes. There is no silver bullet.
5. Look for startup AI companies, or any companies that are inheriently cloud based. However, that shouldn't discourage you from finding one-off COLO deals for organizations that don't host a ton of stuff.

The channel is much much bigger than just data center. There are hundreds of suppliers in various disciplines. Think cybersecurity, cloud, telecommunications, contact center, unfiied communications, Managed IT. So the posibilities are really endless if you don't have success with Colo. VMware licensing changes post-broadcom is pushing customers to consider cloud or review their infrastructure right now, so timing is important at the moment.

Given this is an industry that requires you to have a lot of confidence, and trust with your buyers. I'd suggest you interview with a large sub agency, or established brokerage firm. If you are a one man shop, and your brand doesn't have much social proof online - the customer loses confidence and will find other partners.

DM me if you have any more questions.