I figure if I can get a better picture as to whether money paid for contractor/architect/city planning fees are deductible I can always file an amendment. 

You may wish to confirm that the new 401k provider will handle the ongoing compliance support such as any required 5500 filing (e.g. 5500-EZ for a one-participant plan with assets in excess of $250,000), any required tax reporting (e.g. 1099-r in the event of a distribution or in-plan Roth conversion), mandatory plan updates and amendments, etc.4.

I think the older you get, you'll always be amending your strategy, and the first million is always the hardest.

@Sarah MartinFirst I’d see if the current tenants would like to formally rent it, then amend their current lease.

Claim a refund for your 2016 taxes if they need an amendment or if they have never been filed.

The interest rate was originally 6% in 2009 and when the note was amended in 2019 it was raised to 7.5% - so as I understand, this part complies. 

When applicable, grading plans, septic design and other plans/calculations must be created and also submitted with the pre-approved plans.The vast majority of plans require at least some amendments… e.g. a door or window needs to be moved due to site layout or constraints.

(Prior code § 78-72; Amend Coun.

Tell the lender you plans, send taxes and work towards a solution without having to later file an amendment. 

You’ll most likely need to do several studies and reports to achieve the zoning amendment and the level of detail required for most of those reports/studies can vary.