@swan617 What do you mean by LOW MAINTENANCE?
Do you mean a side business that doesn't take much time to run?
Or do you mean a side business that REQUIRES LITTLE TO NO MONEY to run?
Or maybe BOTH?
If you mean BOTH, here's one LOW TIME and EFFORT and ZERO cash side business
Many new crypto coins and tokens do FREE GIVEAWAYS called "air drops"
These are totally free or are free if you open a free wallet at an exchange or something similar. Regardless, REAL air drops don't require any money payment (if you come across an offer that requires payment, RUN AWAY - it's a scam - real air drops are FREE)
What do you need to get free crypto through air drops?
First, get a free wallet. Create free digital wallets (Google how you can do this) using different protocols (ETH, SOL, etc)
Again, these are free. Run away from those that ask for money.
NEXT, Find air drop announcements using X/Reddit or dedicated Youtube channels or bulletins/announcement lists like Xryptomedia Crypto or even hunt for them on subreddits here on Reddit. There are also air drop groups on FB.
NEXT, study the airdrops you find, make sure they are still ACTIVELY giving out tokens and are 100% free. READ ALL THE DETAILS. If something seems sus, skip it. For the legit ones, follow their instructions for getting free crypto added to your WALLET.
NEXT, keep repeating steps 2 and 3 above for a few minutes every day and also devote a few minutes checking out crypto news platforms regarding EXCHANGES adding NEW CRYPTO to their system - this is the type of news that INCREASES the price of coins/tokens
NEXT, once you find out that one of the FREE TOKEN HOLDINGS you have is being added to an exchange, monitor the price on coingecko closely
NEXT, after one of your coin holdings PUMPS (goes up in value), join an exchange (or if you already are on an exchange, use your exchange) to CONVERT your TOKEN/COIN holding to USDT or other USD stable coin.
From here, you can convert your USD stable coins to BIGGER crypto like ETH or BTC. It's your call
What's important is you converted a FEW MINUTES DAILY into MONEY by a) being patient b) consistently finding and getting free airdrops c) monitoring the value of your holdings d) moving quickly to convert to stablecoins.