I don’t know  the specific details of your situation, but there are other considerations and options as well.

So obviously many of the LPs appear to make these investments not really knowing much detail..

I know there's a lot of details missing to actually give an accurate answer.

@Brian Eastman , @George Blower , and @Dmitriy Fomichenko are all experts in the SDIRA/Solo 401k arena and, I'm sure, will be happy to give you more details.

Here are some indicators to help you assess a buyer's seriousness:Questions: Serious buyers will ask detailed questions about the property, such as maintenance costs, neighborhood amenities, and property taxesStrong Offer: If a buyer makes a strong offer quickly, it often indicates a high level of interest and intent to purchasePrivate Buyers: If approached by a private buyer, ensure they provide a Letter of Intent (LOI) and proof of funds.  

Here's a detailed guide on how to screen applicants: Application Screening Guide

The best advice I can give you for seeking counsel in online forums is learn how to ask specific questions and provide as much detail as you can. 

I would put it in your listing details and also potentially house rules. 

I reached out to the seller to request details of the repair and asked why this was not mentioned in the seller’s disclosure.

I was recently sent details about a 20-unit apartment complex that I’m interested in, but the seller's asking price doesn’t align with the numbers I’ve run.