1. Maximum of 50 peers may not be an issue if you're connected across the globe and not concentrated to a single area.
(since that's quite the average incoming connections)
You can do that by setting multiple addnode= from different locations, like different blockexplorer's nodes as they are connected to thousands.

2. Read the documentation about "Reducing traffic" (github-Bitcoin), it's indicated that maxuploadtarget only limits blocks older than 1 week, so your newly mined block(s) wont be affected by it.

Care to tell how low is your hashrate? "Lottery" is a relatively low number compared to the current difficulty.
Because if it's too low, your miner might take more than a year even when all the pools/farms stop mining Bitcoin.