brick of alltemp or mixed wax: 10$
good iron: 40$
plexi scraper: 10$
scotchbrite pad: 2$ ?
and you're basically all set !
(i know these prices aren't the cheapest ones, but it gives an idea of how much everything costs)
later on you can make some cheap waxing stands out some spare wood and rubber
you can expand the kit with ptex candles and a metal scraper (for base repairs)
and a sharpening tool (50$ or something for a good one)