Which laptop is best for a construction company?

I recently started a construction company, and wanted to ask which laptop would be the most suitable.

600 euro are my budget.

Must already reveal your requirements for a laptop.

For office work it is enough depending on the size you are with 300 euro.

Do you also do something with graphics programs for presentation, it can be scarce with 600 euro.

I have to work with PDF programs and little with presentation programs

As I said for office work, it is easy to get some from 300 euro depending on the size