I would hope that no one would be 'iffy' about a cheap wedding if they cared for you as they should just want to enjoy the day/evening (though I am an optimist).
If you are prioritising the evening get together over dress/flowers/photographer/video/cars then try and break down the components and decide what your priorities are and how little each can cost then optimise your budget and the experience. See what your family and friends want to do to help. You might risk dodgy photographs though you might make an amateur photographers day and the photographs could be excellent (or good enough). A family member might be able to cater for a couple of hundred though your venue might need catering safety certificates.
Get the cheapest large non-wedding venue (Depending on where you live, this might be a social club or village hall-equivalent) that can accommodate the numbers and will allow self-catering or catering brought in. Or take a risk and have an outdoor event in the Summer for maximum cheapness and weather routlette.
Can friends or family cater safely well enough? If not, shop around to find the best, affordable catering you feel happy with.
Discos tend to be cheaper than live bands unless you are friendly with a decent covers band and can play a playlist between sets.
I've attended everything from weddings with a homemade buffet costing a few hundred including venue to one with pie and peas brought in costing less than a £1000 to c£100k in 5 star hotel featured in wedding magazines. One had a mid-day service and no evening do which felt a little odd as most of the guests had to travel for over a hundred miles.
Hopefully most of your guests will enjoy your day.
See what you can afford, how much that can buy and whether you feel comfortable with it.
Good luck.