A good office chair for home use supports your lower back, stimulates movement and lets you sit in a healthy way. So an ordinary dining chair isn’t a good idea. There is no one type of chair that is suitable for working at home. There is plenty of choice, from standard office chairs to alternative seating solutions such as an active sit/stand chair (e.g. Muvman sit/stand stool by Aeris).
A good office chair for home use can certainly be affordable too. For example, you might opt for a second-hand office chair with 100% quality and comfort. What’s more, a used office chair is an economical and sustainable choice. So it’s a win-win all round!