Yes there's cheaper options, inkbird itc-308 is one. A Herpstat would be better though, they have built in safety and dim the heating device instead of on/off like the cheaper ones. Before you order a cheaper one check our fauna classifieds and Craigslist, you may find Herpstats or VE thermostats used. When you check Craigslist look at multiple states and cities, many people are willing to ship.
In regards to rhp size an 80w from reptile basics is usually good. What is the average room temp and the coldest it gets?
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