The smaller lots could be a problem, just evaluate it as such and the potential for reducing number of lots if you need to bring in a newer/used home. 

Reduced expenses for trash and landscape by getting competitive bids.

Is this a good option to reduce costs?

Then work on finding partners/team members that complement you best and can handle the other tasks.Unfortunately, you will still have to deal with people in this business, but having partners that are more on the extrovert side to handle customer service related activities will likely go a long way to reducing your stress.

Most PMs around here start to reduce their percentage fee when you have 10+ units on a graduated scale. 

Buyers using cash to pay for a home do not need to wait for bank approval which can significantly reduce the closing time.

One of the partners will be leasing a space for a reduced rate for his existing business.

I will have a solo 401k soon, and I already have an LLC that generates active income.My ultimate question is this; is there a way to use my solo 401k to reduce my current tax liability?  

Our booking lead time has greatly reduced but the holidays are mostly booked. 

Insurance, Fuel, Maintenance.