If someone offers you a prescriptive plan for an FLR, read it, ingest the bits that work for you then disguard the rest and whatever you do , don't part with any of your hard earned cash! A rational person wouldn't slavishly follow a "Manual for the perfect Marriage" and FLRs are absolutely no different. They are as varied and as subjective as any type of relationship but differ only because the underlying power dynamic (or even just the casting vote) has been pre negotiated. I would even be as bold to say that there are loads of folks out there living this way quite happily completely unaware of the label.
Thinking through your post, I would say that the underlying issue is that it isn't just about your submission - you are needing her to be a strong dominant to enforce this and make it happen. Now only you know what your wife is capable of being and it may well be that this just isn't her way. Anecdotally, the ratio of relationships working this way is much lower than the other way around and generalising wildly, my view is that most woman, being the collaborative, consensus building creatures that they are usually find it very difficult to turn on the inner bitch and demand control. Nice girls just aren't brought up that way and pro Dommes do a roaring trade to meet the demand. At the risk of self aggrandisement, follow the link on my post to my blog and read some of the earlier entries like " defensive domming" and " financial submission" written by me and the sub space blog entries written by my hub. It has not been easy for either of us to run our lives in this way but it does work for us. A written statement is a good start just to out all the hidden assumptions and misgivings. I would emphasise that we are not any kind of benchmark or template and we still run into choppy waters all the time - especially with all the real life stuff going on and baby generated tiredness. What I hope shows outwards though, is a couple working as a team, genuinely in love and presenting a united front to the world. How is is managed behind the closed doors is no ones's business but our own.
Oh and the followers of my blog, readers of the chastity forums that I post on etc etc
Good luck, keep posting and work through it. It is worth the time and energy to get it right.