Cost to dig ditch & install culvert? - Vacant lot flip help

[Tyler Sample]

All speculation at the moment - I've come into two vacant lots (0.37 acres each) in the city limits in my small hometown (6,000 people) and they need some brush cleared. Realtor said cost to tap into utilities will be $1,000 per lot. How much more would it cost if I want to have the ditch dug out and install a culvert on each of them? Both have 75' of frontage. The grass/yard is currently flat all the way to the street with just a slight slope where a ditch used to be years ago. All unimproved.

Any recommendations what I should do with these lots to flip them for cheap? Will have immediate equity once they are mine, seller is desperate to get it off their tax roll apparently.