The first thing to mention is that you do not really increase your privacy with individual addresses.
This doesn't sound right.
If you collect donations on 200 addresses and want to cash them out, you eventually will send out a transaction clustering them.
If you have 200 UTXOs from 200 different addresses, you don't have to cluster them all in one transaction. That's why there's coin selection. OP may not want to cash them out all at the same time. Therefore, they can gain a little privacy. On the other hand, if they have 200 UTXOs in 1 address, it won't matter if they coin-select or not as they'll have revealed that all these outputs are owned by the same person from the beginning.
Plus, they may not want from their people to know how much money there are donated. If they use 1 address, they're doomed to reveal it.
So you have 3 options
A fourth option is to use a decentralized exchange such as Bisq.
There is not "a bit of privacy". the efforts using various addresses is neglible in his case. Thats all there is. Its not worth spending brain over it. Absolute not important as 99% of his problems are getting money into his account frm abroad that is from crypto sale. And for that, it doesn't matter.
I mean it doesn't hurt and yes, maybe it helps a bit but given the overall challenge he has, thats the last he should care.