How do overcome a possible objection to the buyer (sale) that its a possibility to the DOS clause could trigger and there could be problems?  

Yes you can do off comps, but personally, i don't have the confidence to pull the trigger without significant exposure.

My short term goals are to help investors as a broker and to do a couple of fix and flips of my own or in partnerships. 

Would you recommend a partnership in my situation or do you have any advice for people who are ready to do it, but just afraid to pull the trigger because they know they don't know enough yet?

You can easily earn 6-14% return on your money though writing first and/or second mortgages to other investors.Another almost hands-off approach is to partner with an experienced investor - naturally with a proven track-record of success - in your area - either in direct partnership or purchasing into a syndication.  

I know am ready to pull the trigger but cash money is holding me back.

Partnership.

Try investing a smaller amount into some form of syndication, partnership or crowdfunding until you have enough to go at it alone.

I was leaning toward using an HML in exchange for a percentage of each deal for the duration of our partnership...

They become so afraid of making a mistake or of losing money that they never pull the trigger.