I need help with structuring my FB ad account setup

Basically, i want to build a foundation that can later on be connected to a main business account I will transform into a legitimate agency account.

In the meantime, i want to be able to transfer control to clients over our existing accounts, without them actually logging in to them (we are afraid it is too technical for our customer profile, and the accounts will be tempered with)

I was thinking about AdsPower or GoLogin (or the other many tools out there) but wasn't sure if this is the right way to go,
and if it is possible to transfer "sub accounts" to clients in that case.

is there a better option to transfer control over the account to less savvy people (maybe trough BM itself would be a better option for example)

So basically my questions are, what is the best way to transfer control, but not full control (ie like renting)

And does running a few of these subaccounts, can be later on connected to a main one, to be eligible to become an agency account?

In case of transfer of temporary rights to the account, it would be better to choose a gologin. This browser has a workspace, through which you can give temporary or partial rights to your account while retaining your rights. This is my opinion, but in any case, check out this feature. Perhaps this is what you are looking for

You can use adspower, when granting temporary permissions to sub-accounts