If you want to charge for out of the ordinary things like a trip charge for unlocking the door for a tenant who accidentally locks themselves out, go ahead.... but then you'll have tenants try to break-in through windows too.

So just report it on you taxes and also report the utilities you paid for as ordinary and necessary expenses.

Partners have unlimited personal liability for the debts of the partnership and the wrongful acts or omissions of any partner acting in the ordinary course of the business on behalf of the partnership.

SE income is subject to SE taxes in addition to ordinary income taxes, because of this most people prefer to make pre-tax contributions to avoid ~12.2% SE tax...When you say SE I assume you are not talking about wages and that you are talking about earnings from self-employment....Most strategies around pretax and post tax contributions are based on expected tax rates. 

@Dylan TranIt appears that the LLC has 3 members and it made a total of $30,000 profit in 2017.It also appears that the activity of the partnership is flipping homes.If this is the case - the partnership will file a partnership return and provide each member with a K-1 listing out $10,000 of ordinary income that is subject to self-employment tax.

And because it's a flip you're prolly looking at ordinary income plus self employment plus ACA surcharge. 

For the most part, if it is reasonable for the rental it is deductible (technically the rule is ordinary and necessary, but for practical purposes it is that the expense is reasonable).

Friends...can you please suggest which will be best bet Condo/Patio/SFH for rental ? 

Most likely you are taking a fairly large tax loss on this property against your ordinary income.

The payments will be ordinary (self-employment) income which will give the student income history (good for loan quals).