On a $1000 USD budget, what is the best full node hardware to purchase (to run “BITCORE” on ubuntu)?

Looking to purchase the hardware from amazon.

Will install ubuntu and Bitcore (must be bitcore, we want to use it as a wallet service for trezors and web insights too).

Probably would be nice it it has a 2.5" hard drive slot so we can add a large SSD to future proof it.

Does celeron/i3/i5/i7 make any difference if it only runs Bitcore?

thanks