He is not accepting rent, no harm to you. Send him legal notice to provide you account detail so that rent can be directly deposit in his account If he do not provide, stop paying rent, you will not be at default.
Also mention in the notice about redevelopment and his failure to provide precise plan and conditions of redevelopment in writing.
I bought a 525 sq ft (Carpet) flat - ??? than wheres is the question of rent come when you already purchased it. You must be having registered deed ?
No eviction. Whoever will testify false in court will be prosecuted for perjury. You are in long possession, this can easily be prove.
Don`t go with oral commitment, bogus.
No fault. pay or not pay if he do not accept. Just send him noitce. And don`t pay him anything for redevelopment, and never in cash until proper receipt given.
5 - Don`t agree.
6 - No disadvantage, all have their own priority.