For me they will most likely want the last 3 as that is sop. I am not worried. I reported every check I got and did not write off a few things as they would be hard too prove personal/business.
Example my 5th wheel I am living in while I am building my house. I bought it for a job site trailer for 1 job, but kept it afterwards as I knew I would need it for what it is being used for now. Hard too put a value on its use on a job site as you can not rent a job site trailer that is anything other then a office. This one I bought so I could live on site during the week. While I am sure I could claim some % of its costs, is the few hundred worth the massive head ache? No it's not