-Make sure the property is in a good location first and foremost; close to amenities/attractions; use google street view to make sure it is not on a super busy street, across the street or adjacent to a distressed property or low rent business etc (probably not an issue at your price point)
-Run the numbers with all the free tools mentioned; good idea to play around with subtracting a bathroom and bedroom within those searches to be sure there are no outliers skewing the data and to be more conservative at the low end of your estimations
-Check the comps for neighboring properties; how full are their calendars and at what price; also average review rating for location and what comments the guests are leaving about the area (safety, noise, proximity)
-Extra points for properties that are surrounded by more valuable homes; makes appreciation and profitable exit plan more likely
-As for monthly bills, sometimes this is tough but by your 2nd property for the area you should have a decent idea. Just make sure you are accounting for all the various categories of bills you will have aside from the obvious utilities (lawn care, pool care, snow removal in cold areas, consumables, higher insurance cost etc)