None of these are mutually exclusive, but even setting some prioritization in relation to these will be helpful. 

@Dhiraj Chhabra Or use the section121 exclusion and you get to keep 250k or 500k if married filing jointly in profit tax free.

.- If no earnings- Since the conversion is of the non-deductible contribution, the prorate rule is not required-If there are earnings on the nondeductible contributions before the backdoor contribution of these amounts to a Roth IRA, then a portion of the amount distributed from the traditional IRA would be includible in gross income (as per the exclusion ratio for IRA distributions), under which the excludable portion of the IRA distributions for the year is determined by multiplying (1) the amount of the distributions by (2) the ratio of (a) nondeductible contributions, over: (b) the sum of (i) the aggregate balance of all the individual's traditional IRAs on the last day of the tax year, (ii) the sum of all IRA distributions for the year, (iii) outstanding rollovers, and (iv) amounts converted to a Roth IRA from a traditional IRA, SEP, and SIMPLE IRAs.

The two loans are mutually exclusive so you do NOT need to be on the VA loan for a certain amount of time before purchasing an investment property. 

After purchasing 21 units I became an agent to work exclusively with investors and on my own portfolio.

A VA loan is not exclusively a first time home buyer loan. 

Since it wasn’t your primary residence you lived in for 2 years, then no section 121 exclusion.  

You will learn much more, much more quickly speaking to experts in this specialty field than chasing down rabbit holes on the internet.There are rules associated with keeping the tax-sheltered status of this money, largely around keeping things exclusively for the benefit of the plan and avoiding intersection with yourself, lineal family, or family businesses. 

So if the seller has a signed agreement with the agent stating that agent has exclusive rights to sell, that agent will get paid regardless of who sells it.

When it comes to selecting a realtor to work with some may ask you to sign an agreement that you work with them exclusively.