See if you really want to go with the wireless option, considering the range of products available in India is quite narrow, MicroTik products are a decent option. Not too expensive and will give you reliable performance as far as wireless goes. Like mentioned before,
Ubiquiti is the preferred one, even by BSNL for their Air Fibre project.
As far as not making a profit goes, you cannot resell a single connection to multiple different houses. I think you have misunderstood how/what Air Fiber Franchisee means. Franchisee means you install the equipment: wireless, fiber, copper, etc and it’s your responsibility to maintain it. You invite customers to come forward and take BSNL’s connection via your internet distribution network. BSNL creates new PPPoE login credentials for each customer which is linked to their Customer Acquisition Forms.
Those customers pay the full rate for Internet to BSNL, from which BSNL shares a percentage with you. If you roll out all of the equipment yourself, then that can be upto 50% revenue from each customer. If BSNL provides some equipment, like power, OFC, then the revenue share goes down to 20-30%.
It is illegal to take a single connection and share it to multiple households. ISPs are required to maintain IP logs/
DNS logs linked to PPPoE sessions for legal reasons. Also to operate as an ISP, you need an ASN and also a registration as per the Postal and Telegraph Act. So please do a thorough study on if you will obtain paying customers or not, and then proceed.