Compare outcomes, not just hourly prices
Get a written scope for professional work: the area, preparation, finish, waste handling and exclusions. Compare that with the same outcome in your DIY plan. A low equipment price does not establish a cheaper finished job.
Include the work around the work
Add collection, preparation, consumables, clean-up and returning the machine. Think about whether you need assistance, transport or additional equipment. Use the project planner to make these costs visible.
Consider competence and consequences
Some work needs particular skills, authorisations or professional judgement. Fragile surfaces, old coatings, hazardous dust, access issues and unfamiliar machinery can change the decision. A planning website cannot assess your site or certify a task as safe.
Know when to stop the DIY plan
If the supplier cannot confirm suitability, the machine cannot reach the site, or the potential damage exceeds what you are comfortable with, seek qualified help. The cheapest option on a spreadsheet may not be the best practical option.
Further reading: official supplier information ↗. Supplier terms can change. This is a reference, not a partnership or complete market comparison.