Memory - minimum of 8 gig
processor - intel i5 get a new one with the 8th generation chip, they have 6 cores and run a lot cooler than the older chips.
SSD - solid state hard drive would sure make the system faster.  Can be added later if needed.

Here are some that would work.

https://outlet.us.dell.com/ArbOnlineSales/Online/InventorySearch.aspx?c=us&cs=22&l=en&s=dfh&brandid=2202&sign=PXhcOSHtr1T4IOw%2fPR7UdRETLnrhDXiYVlXi4UkIsF7UBWhcNFDktwWrBc0GCQVC1u8Y%2ftg6Ji%2bRzOy1jI8%2fTOOdQjuEHudAepkgZJxAn8m0YMO4yLJ%2f7hN0ZnLysPSXyFAIo4A7JX3Ed32Dv%2fkGJ0xC23ENp4g4ioG1%2bIwQ3aePggCsBMerQ6TVgzJQdxnTLOoHyZD%2bQ1VIhHNHfCxFHSGeounNpGKgXgKBu6NPXeVM7Tmchv59RlOU1YMF6Vn0bvhjHiDPwooMCT5T21CGnT9pOe%2fIetzGz%2fqkvCjmPIEhUm0q%2b3Yv8Z9mUDlGHLwqJU0%2fuvrHlH5lUq0TMHLZ6TGDChJB%2fDGs2Nf84ytLypULRQ8guF93Tuz526p0hbQyWId79IfqOeA6C31QhDkfTIxzR1zh7RwAOGqHPEeqzXOivz5vomDKVZi1Ojod9WIkyeBqKmjonKCjVX3r8ghXUqdUo1plFD1PCk9VJUyvx3Q86lvcbk9Ocg%3d%3d