suggest pc for tally server & office work

1. What is the purpose of the computer? What all applications and games are you going to run?
Ans: Mainly for web browsing, tally(total 6pcs will be connected via lan as this pc will act as main server for all,office and other companies billing softwares like udaan,mtac etc

2. What is your overall budget? If you can extend a bit for a more balanced configuration, then mention this too.
Ans: under 40K

3. Planning to overclock?
Ans: No

4. Which Operating System are you planning to use?
Ans: Windows 10 Pro (x64)

5. How much hard drive space is needed?
Ans: 500gb ssd enuf

6. Do you want to buy a monitor? If yes, please mention which screen size and resolution do you want. If you already have a monitor and want to reuse it, again mention the size and resolution of monitor you have.
Ans: already have dell 22 inch monitor

7. Which components you DON'T want to buy or which components you already have and plan on reusing?
Ans: Keyboard, mouse,UPS(Already have)

8. When are you planning to buy the system?
Ans: in 10 days

9. Have you ever built a desktop before or will this be done by an assembler?
Ans: Yes

10. Where do you live? Are you buying locally? Are you open to buying stuff from online shops if you don't get locally?
Ans: Ranchi
11. Anything else which you would like to say?
Ans: motherboard Asus

My requirements:
Cabinet(under 3000 INR)
Memory 8GB