Secure wordpress website with built in bootstrap & ability to purchase 2 - 4 products

General information for the website: We provide will writing services online
Kind of development: Customization of existing website
Num. of web pages/modules: 5-6
Description of every page/module: I have some knowledge in web design all artwork can be done by myself and the setup of static pages. It will need a section for users to fill out a lengthy form then the ability to pay online set at range of 4 different pre defined prices. Once purchased the customer will need the ability to login into an account and see their individual files and account details.

The bootstrap is (site admin)
Description of requirements/features: Will need to be fully update able by me and i am mainly looking at the functionality of the site as mentioned the design i can take care of. i would quite like the ability to use a theme that i will purchase also?

i like the site http://online-wills.co.uk and the section for bootstrap is http://www.wills-online.biz/start

also like the site http://www.willsregister.co.uk also https://www.legalwills.co.uk/members/mywill_intro?t=t&ref

Specific technologies required: bootstrap, secure customer account etc, ability for me to upload private files for customers.

Similar urls: http://www.wills-online.biz/start
http://www.wills-online.biz
https://www.legalwills.co.uk/members/mywill_intro?t=t&ref
http://www.willsregister.co.uk

PRICING: price can be flexible? AND POSSIBLY ONGOING WORK NEEDED.