As a seasoned Finance and Data Analytics Professional with a deep understanding of intricate financial calculations, and proficiency in Excel and Google Sheets, I'm your go-to expert for this project. Having developed similar complex models in the past, I'm confident in my ability to execute calculations surrounding the property's shared ownership scenarios under varying inputs that you've outlined. Through my experience and expertise, not only can I incorporate several influencing factors into the calculations as required, but also create straightforward dashboards that could showcase various potential ownership models dynamically. This would help both parties in better understanding the possibilities of their shared mortgage journey. I prize client satisfaction above all else and to that end, I am willing to provide you with a limited edition of what you require to evaluate my skills firsthand. By choosing me for your project, you are guaranteed reliable work delivered on time and within budget. Let's connect and discuss how we can exceed your expectations together.