People who can't afford to get divorced.
When I got divorced my ex stipulated that her costs got paid by me, (including the PI he had following me), then shared equally, and finally she ate all her costs and all mutual (liquidation) costs. It got kinda pissy during the 19 months.
As I recall, my lawyer told me the cost of both parties lawyers were negotiated into many settlements, many times with the breadwinner paying the brunt of the costs. He said, having one atty is about the same as a do it yourself divorce kit you get in the mail
I don't know about Kansas as I have lived in JO CO, owned property there, but never was married or divorced when living there. But I am sure, that today in Kansas, unlike years ago, a prenup is a simple matter to do.
Realtors will tell you not to use discount brokers, lawyers advise not to use on line services, and insurance agents tell you not to deal direct. but times have changed and on-line law is the same as sitting down with a lawyer, at least for me it is. I talk with a MO lawyer or an IN or AZ lawyer depending on my needs. I've saved thousands and never had an issue. If you are talking about using a document farm, that's different. I am totally against that as anything other than to show you what a document looks like, not contains. I guess they would do fine to protect the ownership rights to your 55 Vette, but there will always be the issue as to whom the new engine you both paid for belongs.
If you want to write a "pig farmer" prenup you're probably going to need to just keep the atty. on retainer, but for most a prenup, either on line or in person, is not complicated, if it is you need to get more than a basic prenup, you need asset management services.
Trusts, prenups, and cohabitation agreements, are great things, but all can be made more complicated than what they are worth. If the OP has a house, retirement or other financial interments, as major assets then IMHO he can do it on line. If he/they still aren't warm and fuzzy about it they can sit down with you. At least they will have 95% of the work done before they get there.
Just for thought: I have a guy in one of my car clubs who does divorce asset retention law. Lawyers send clients to him to find ways to maximize the money going to each party and reduce costs of sales of assets, penalties, and taxes. It's a niche that is always good for a funny story.