the property is worth $140kThe seller is willing to carry back (let me owe him) the $40k,  would any lender let me put in a smaller amount taking into consideration the $40k will be a second position

Although there can be other reasons, real estate investors often choose to hold property through an entity or entities in consideration of limited liability and asset protection. 

@Maria D'Aura that is a broad question and deserves a bit more consideration. 

Like it take into consideration of year of becoming a real estate? 

If the money I can make after taxes (let's ignore the possibility of a 1031 exchange for now since that's a whole other conversation, but of course is a consideration) when selling exceeds what I can expect to make in a 5-7 year period, I usually sell. 

Thanks for your time and consideration. 

I have focused so much on the previous 4 years on debt pay down, without too much consideration on my minimum payments. 

@Brynn RaberPlease see the following regarding Considerations re Investing in Real Estate & Considerations re Choosing a Self-directed 401k/Self-directed IRA provider:General Considerations Re Investing Retirement Funds in Real Estate:1.

Tax considerations aside, Coops are not investor friendly - we have too much equity in it, and borrowing against a coop is difficult, which leads to a very low ROI.

Im talking about rent payments, application fees, and consideration fees around 10k