Totally agree with Jimmy’s points.
Sounds to me like your SM is getting a cut from the lawyer. Also even if you get a lawyer written bylaw what is to say you will get the 75% yes vote to get it registered.
If the OC cannot agree to a general bylaw (funded by the OC) then submit one yourself in plain English accepting responsibility for the ongoing repair and maintenance of this and future renovations in your lot. I don’t believe the OC should be involved at all with cosmetic renovations within the lot, that don’t affect others.
If they reject your plain English bylaw go ahead with the renovations anyway and let them take you to adjudication which I believe will be thrown out as you will have done everything right and the OC is being totally unreasonable rejecting your request.
Bear in mind that for the SM to go to adjudication he will charge the OC Thousands of $$ with every likelihood he will loose.