Hi Kangaroo, Thanks for your advice. I am okay with overlaying the existing wall tiles and the renovation for the toilets are complete overhaul. As for payment terms, I would like to find out what is a reasonable payment terms, eg 10% down payment?? per milestone completed10% upon final completionI got 1 prospective ID quoting 50% upon commencement of work, I believe this is unreasonable, right ?