How can I strengthen this? 

That said, there are other ways you can strengthen your offer such as putting a dollar threshold on any potential inspection objection, offering an appraisal gap, escalation clauses, etc.

You can also offer a balloon payment at 5 years, which allows you to strengthen your credit, lower the principle, and refinance before the end of the term.

The new vehicle (regardless of $) can continue and strengthen your motivation (works for some, me being one of them).

Since there is a lot of dollar denominated debt other countries will have to print more of their currencies to buy more dollars which will keep strengthening the dollar.6.

Smart, cash flowing properties will protect you in difficult times, strengthen your resolve to invest more, and give you the financial returns to accelerate growth. 

One way to strengthen your offer in today’s low-inventory market is to use an escalation clause.

Running your operation like a true arm's-length business with it's own accounts and accounting procedures, not co-mingling funds, taking proper draws when you need funds to pay personal expenses (as opposed to writing a check from the business account), all strengthen the separation between you and your LLC.  

Educating yourself through bigger pockets forums, podcasts, youtube videos and reading real estate books will go a long way in strengthening your mindset because Real Estate is a long term game. 

Building strong routines that you stick to will change the game and strengthen you when you hit rough seasons. :)