Yes. Mobile CCTV towers, rapid deployment cameras and solar-powered surveillance units can be funded, typically on hire purchase or lease. They are serial-numbered, self-contained and movable, which helps, but they sit in a smaller niche than mainstream plant so the field of interested lenders is narrower.
How you intend to use the tower matters a great deal. If you are buying one to secure your own sites, it is assessed as ordinary business equipment. If you are buying towers to hire out to third parties, lenders treat that as a hire-fleet proposition and look at it quite differently — see the next answer.
Practical points to raise with your supplier before you arrange funding: the connectivity and monitoring subscription, the monitoring station contract if you use one, maintenance and battery replacement, and insurance while the unit is deployed on other people’s sites. Those running costs sit outside the finance agreement and continue for as long as you own the tower.
The equipment remains the lender’s security. If payments stop it can be recovered, including from a customer’s site, which is awkward if you have hire commitments running. Every application is underwritten by the lender.