That is not how Uniswap or any other automated market making solution works. If you have deep pockets it would be prohibitively expensive to buy up all the maid, the whale would never be able to sell it at a profit. All that would happen is other sellers will flood in to sell their Maid at huge premiums to the silly whale who thought they can just buy up all the liquidity just because it was (initially) at pocket change prices for them. Worth taking the time to understand this space it now manages billions in value in a completely decentralised way, is here to stay and for very good reasons.
No. There are much better ways, decentralised finance is just starting but the emphasis is on the decentralised part. A fully decentralised smart contract implementing a two way bridge on one of the decentralised cross chain projects is the only solution that can be independently verified and so, trusted. One where anyone can audit the smart contract(s) governing the two way swap.
If you are going to put development time in don’t waste it on a centralised solution that will be pretty much guaranteed to fail: very few will trust it no matter what multisig system is used to “secure” part (exactly the Omni Maid half) of the swap process. Any centralised unseen bugs or malicious intent would be free to inflate the ERC-20 half of the swap regardless of multisig.
See Fusion chain and maybe Ren Project for possible candidates. In addition to building a trusted decentralised system you would also be refining smart contract dev skills that are currently in very high demand.
I would just add that anything you do develop, it will (hopefully) have a short shelf life. When Safecoin arrives it would be back to the drawing board for the two way bridge and I think one of the main reasons nobody has bothered to put the time in to date.