In my mind, that outweighs the additional interest you will pay. 

Your new cost basis is only your existing cost basis plus any additional debt/cash invested.

I strongly favor regular price reductions until leased out.Most people make the mistake of letting it sit too long when simple math points to that fact that 2 additional weeks of vacancy at $1000 per month equals $500.

I'd recommend analyzing 50 private placement offerings to gain knowledge and define your criteria for investing in them.Properly investing in syndications can be mostly passive but it takes upfront work and education to get there. 

No major additions or big construction.Without running a full appraisal, I can only guess on the value, but I think it'll depend on how good our wholesale deals were below market rate.

If you just sell it, the first $500k is taxed at 15% as Long Term Capital Gains, anything over is 20%, No SS .... 

In summary, do you think it's a good idea for me to partner with someone for my first deal, put in some or all of the money, take a smaller return, but gain knowledge and confidence to start on my own in the future?

While the standard Chiacago Association of Realtor's City of Chicago 2023 lease is updated and compliant with new 2023 security deposit rates and local ordinance, we always recommend implimenting an additional "overlay" or addendum that helps protect the landlord against many things that the standard lease cannot standardize that many landlords would like to, like no smoking.

So instead of putting 25% down on one $300K new build, I purchased 5 homes with about the same money down (slightly higher due to additional closing costs).

I would essentially be taking on about 4.2MM in new debt to realize $4,400 gain.