TCO Total Cost of ownership of a PTMP solution

Guys, I need some fast info on Cambium. I had heard of the product but nothing about it until yesterday. I am new to the  WISP game. I am not new to RF. Cambium looks solid, I understand the jargon. However I would like to understand some fast facts on real world deployments in particular an easy use case. I would like a TCO over say 3 years to deploy and operate a cambium PTMP solution, I have zero pricing information at this time:

1. A PTMP (5 Ghz station 5725 to 5845Mhz) with 10 subscibers, 3 years total operating costs, software, licenses, complete hardware recommended solution.

2.  A PTMP (5 Ghz station 5725 to 5845Mhz) with 20 subscibers, 3 years total operating costs, software, licenses, complete hardware recommended solution.

You can pick any product you like that's worthy and makes sense. Lets say a data cap plan of 25Mb/s per sub. As for me I am looking at an opportunity for myself, weighing it up, looking at ARPU and ROI. Does it make sense and to do that I need a scalable solution with marginal incremental costs to add 1 more client. I see Mikrotik, I see UNBT as well, I can already see some limitations with the proposed offerings there but price is low, I just need to weigh up the extra CAPEX and understand the value of Cambium. I suspect with Mikrotik all going well (i.e) I have too many subs, I need to do a rip and replace or complete extra  additions, (without any spare spectrum most likely), after 12 months, don't want that.